Eliot Spitzer’s book about his so-called Sheriff of Wall Street days as a Manhattan prosecutor and state attorney general has been selling at a snail’s pace, new data show.

“Protecting Capitalism Case by Case” has moved just 70 paperback copies since its July 15 release, one week after Spitzer declared his intention to enter the race for city comptroller.

The poor showing led the spokeswoman for his rival in the race, Manhattan Borough President Scott Stringer, to tweet the numbers with a mocking frowny face.

The data from Nielsen covers 85 percent of retail sales, but doesn’t include e-book download data.

“I’m sure more were downloaded, but I don’t want to argue with the Stringer campaign who, if the polls are any indication, are experts on producing low numbers,” said a Spitzer spokesman, referring to recent polls showing Spitzer with a significant lead in the race for comptroller.

Spitzer’s not the only candidate for citywide office whose book has been widely overlooked.

Mayoral hopeful Christine Quinn’s memoir has sold just 225 copies since its publication more than two months ago, according to Nielsen.